The installation procedures of different types of hot blast stoves are different, but the main procedures are interlinked. The main contents of the preparation work before installation are as follows: checking the integrity and accuracy of the technical data of hot blast stoves, registering and filing, compiling the technical documents for construction, and handling the start-up report for the installation of hot blast stoves; Inventory the equipment parts on the spot, register the defective parts, fill in the quality inspection records of the main parts; carry out site land use, water, electricity, gas and temporary construction; organize the construction machinery to enter the site, etc.
2. The main work contents of hot blast stove foundation acceptance and marking stage are as follows: Installers should check and accept hot blast stove foundation together with construction units, construction supervisors and civil engineers, and fill in basic records; according to drawing coordinates, the vertical and horizontal central line of hot blast stove, elevation datum point and coordinate center position of each foundation should be delineated.
3. The main work contents of the installation stage of steel frame and platform are as follows: checking the number and shape size of steel frame platform, filling in records, adjusting and correcting the exceeding standard, and filling in the record form the actual delay inches after correcting; configuring the base cushion iron; assembling the bulk steel frame into pieces, lifting and positioning after checking qualified, and correcting. Fixed and welded steel beams, measured geometric dimensions after welding, filled in steel frame installation records; hot blast furnace foundation secondary grouting; steel platform bracket installation.
4. The main work contents in the stage of installation of heating surface of the main body of hot blast stove are: quality review of the drum and header, especially the quality of expansion nozzle hole, which should be checked, measured and recorded; quality inspection, measurement and record of heating surface tube; proofing, annealing and tube end treatment of heating surface tube; Installation and fixing of base and drum, and record; hoisting of header in place, correct and fix, and record; expanding tube, strictly control the quality of expanding tube, and record; before and after expanding tube, every tube should be tested and recorded.
5. The main work contents of the assembling stage of the water-wall tube row are: slice welding and correction of the water-wall tube, pass-through test before and after welding, record and install the descending tube.
6. The main work contents of superheater installation stage are: correction and global test of superheater serpentine tube and record; installation of superheater box in place, correction, fixing and record; material spectrum analysis and inspection report of alloy steel parts of serpentine tube, pipe clamp and hanger; assembly welding of serpentine tube and geometric dimension measurement record. Lift in place, correct and fix, fill in the installation record of superheater.
7. Installation of economizer
The main contents of this stage are as follows: installation of steel tube economizer is similar to superheater; installation of ribbed economizer should pay attention to the parallelism of flange face of ribbed tube end and the graphite powder coating of gasket, water pressure test, installation record of economizer and water pressure test record.
8. Installation of the inner device of the drum is carried out after the water pressure test of the main body of the hot blast stove is qualified. Its main work contents are: counting the number of internal devices, spot welding firmly one by one, preventing the occurrence of steam-water passage, ensuring the effect of steam-water separation, and reserving expansion gap according to the figure. Fill in the through-ball record of the downward tube in the drum and the closed record of the drum.
9. Installation of industrial hot-blast stove burning device has various forms. Now take the installation of chain grate as an example. The contents of this stage are: checking all components before the assembly of chain grate, especially the pitch and thickness of chain and chain plate, and recording the installation of front and rear axles and sprockets of the grate. Distribution deviation should be checked and recorded; installation of lower guide rail and wall plate base should be based on the central line of hot blast stove, correcting the position of wall plate and beam, leaving expansion gap; installation of bracket and side seal; installation of front and rear axles; installation of furnace chain; installation of furnace strip; adjustment of front and rear axles, check the tightness of furnace chain, and make cold trial operation of grate after proper operation. And make a record.
10. Installation of steam and water pipes, valves and thermal instruments within the scope of hot blast stoves is a relatively detailed part of the work, and the inspection, test and installation records should be made one by one.
11. The water pressure test of the pot body should be attended by representatives of the construction unit and supervision engineers, and the visa should be given on the overall water pressure test report.
12. Record the construction of furnace and heat preservation and the tightness test of air duct and flue.
13. Installation of ancillary equipment shall be carried out on a stand-alone test machine and qualified, in addition to recording the installation.
14. Baking and boiling stoves. The plan of drying and boiling furnace should be made, the heating curve should be worked out, and the control should be made to ensure the effect.
15. The trial operation of hot-blast stoves is a major inspection of the quality of design, manufacture and installation of hot-blast stoves. It should be closely organized. The trained personnel of the construction units should be on duty and carry out their set of rules, regulations and operating procedures. The representative of the local hot-blast stove pressure vessel safety supervision organization and supervision should be involved in the trial operation. Set up representatives of the unit and other relevant parties to participate; after the trial operation is qualified, the visa shall be processed in time.
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